JPS583720B2 - drying control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drying control device suitable for use in clothes dryers, etc., and its purpose is to automatically maintain constant drying control in response to voltage fluctuations, ambient temperature fluctuations, amount of clothes, etc. Dry to get a finish.

Currently, the most commonly used dryers use a manual drying method with a timer set for one hour. Because of this, it has the disadvantage of being prone to under-drying or over-drying.

Furthermore, when using low temperatures in winter, when the current standard drum dryer is set to a rated load of 2 kg, the maximum drying time is 120 minutes, which results in undried drying, which is inconvenient in terms of usability as it requires resetting the time. Ta.

In addition, it is extremely difficult to detect all different types of clothing with the same dry finish state, so it is possible to obtain a preset delay time from a predetermined drying level, but depending on the type and amount of clothing, There was a problem in that the user had to judge and decide the setting time.

The present invention automatically detects a predetermined undried level in response to power supply voltage fluctuations, ambient temperature fluctuations, amount of clothing, etc., and obtains a delay time corresponding to each. It is designed to obtain a dry finish of

Figure 1 shows the relationship between drying time and drying rate, and the curves A, B, and C are for ■, power supply voltage fluctuation, ■, ambient temperature fluctuation, ■, clothing load fluctuation, ■, and ■~■. This can be considered for each combination. First, if we consider the case of power supply voltage fluctuation in (①), let's assume that the voltage fluctuation is 100V.
Assuming ±10V, A corresponds to 110V, B corresponds to 100V, and C corresponds to 90V.Since power is generated in proportion to the square of the power supply voltage, the lower the voltage, the longer it takes to reach the specified drying rate. Become.

The same thing can be said for the ambient temperature fluctuation in (■) above, and as the temperature goes from high to low, the curve shifts from A to C.

Regarding the clothing load change described in (2) above, the curve also shifts from A to C as the amount of clothing increases from small to large.

The present invention detects dryness at a predetermined drying rate (the level shown by K1 in FIG. 1, which is a predetermined undried level) according to the combination of voltage, temperature, clothing, etc., and detects the dryness up to that point. Measure and calculate the times A, B, or C, and calculate the drying rate in the finished dry state from the drying rate K1 (K in Figure 1).
This is an attempt to automatically set the delay time a, b, or C up to 2).

Examples of the present invention will be described below. Figure 2 shows the basic configuration when the present invention is applied to a clothes dryer, in which 1 is an AC power supply, 2 is a push button switch, 3 is a drum (not shown) for drying clothes, and a A motor for rotating a fan for sending hot air from the heating element 4 into the drum; 5 a circuit means for automatically controlling drying; 6 a circuit means 5 which is closed when the switch 2 is turned on;
It is an opening/closing means that opens by the output of

FIG. 3 is a block diagram for clarifying the basic operation of the circuit means 5 of FIG. 2.

In the figure, 7 indicates the electrical resistance of the clothing inside the rotating drum, 8 indicates a conversion unit that detects the above-mentioned electrical resistance change as a potential change using an electrode sensor provided on a part of the inner wall of the drum, and 9 indicates the electrical resistance of the clothing. A reference setting section 10 determines that the drying rate reaches a predetermined value and a preset drying rate, and 10 is a voltage comparator that detects when the electrical resistance of the clothing exceeds a predetermined value in comparison with the reference setting section 9. .

Further, 11 is means for measuring the drying time until reaching the predetermined undried level, and 12 is the voltage comparator 10.
13 is a calculation means for calculating a predetermined ratio of the measured values by detecting that a predetermined undried level has been reached; 13 is a means for measuring a predetermined time for completely drying the clothes based on the calculation result; 14; is means for controlling the operation of the dryer for the predetermined period of time described above.

The means 11 for measuring the time until the predetermined undried level is reached, the calculating means 12 for determining the subsequent time required based on the drying time, and the means 13 for measuring the required time are one-chip LSI calculations. It can be configured with a processing device.

Therefore, clothes can be completely dried by combining a predetermined undried level detection section, a load control section, and an arithmetic processing device.

As described above, according to the present invention, a constant drying finish can be automatically and always obtained in response to changes in the amount of clothes, power supply voltage, ambient temperature, etc., and thus the usability is greatly improved.

Furthermore, since a dry finish can be obtained without depending on the user's sensations, there is no need to worry about undrying or overdrying, and there is little chance of damaging the fabric.

In addition, the level when completely dry is generally 100 to 104%.
Although it is called RH, it is difficult to detect this level because the detection error is small.

However, according to the present invention, since it is relatively easy to detect when the drying rate is 95%RH or less and has high accuracy, first, a predetermined undried level is detected, and the dryness up to this detection is performed. The apparatus is equipped with a means for measuring time, a calculating means for calculating a predetermined ratio of the measured values, and a control means for continuously operating the heating means for a predetermined period of time based on the calculation result of the calculating means, There is no need for troublesome operations such as resetting the timer for one hour, and
Overdrying due to the above-mentioned reset can be prevented from occurring.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the relationship between drying rate and drying time of a clothes dryer, Fig. 2 is a diagram showing the circuit configuration of a dryer in an embodiment of the present invention, and Fig. 3 is a block diagram showing its basic configuration. FIG. 10...Voltage comparator, 11...Drying time measuring means, 12...Calculating means, 14...
...Operation control means.

Claims (1)

[Claims] 1. Means for detecting dryness at a predetermined undried level, means for measuring drying time until the predetermined undried level is reached, and calculation of a predetermined ratio of measured values when the predetermined undried level is reached. What is claimed is: 1. A drying control device comprising a calculation means for performing the calculation, and a control means for continuously operating the heating means for a predetermined period of time based on the calculation result of the calculation means.